Note: Descriptions are shown in the official language in which they were submitted.
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DYE FOR CIGARETTE WRAPPER PAPER
AND CIGA~ETTE I~AVING DYED WRAPPER
RA~'K~::Rt')llNn OF' THh~ TNvENTIoN
Field of th~ Invent i on - --
The present invention rélates to dyes, and more
particularly to a dye coating f or a cigarette wrapper
paper including cocoa as the dye. The present
invention f urther relates to a cigarette having a paper
wrapper coated with a cocoa dye.
Descri~tion of th~ Prinr Art
It is known to dye cigarette wrapper paper using
humic acid salts. However, such salts generally
interfere with the desired taste of the cigarette.
Other materials have also been tried as dyes, but for
one reason or another have been found to be
unaccepta~le f or use in a cigarette .
It is an overall objective of the present invention
to provide a dye f or a cigarette wrapper which does not
affect the taste of the tobacco. It is an objective of
the present invention to provide a dye particularly
useful for dying a cigarette wrapper paper using cocoa
as the pigment. It is a further objective of the
present invention to provide a cigarette having a paper
wrapper circumscribing the tobacco rod which is dyed
brown with a dye having cocoa powder as the pigment.
SIlMMARY OF THE INvENTToN
The pre6ent invention provideF: a dye coating f or a
cigarette wrapper paper comprising a solvent system,
cocoa powder as a pigment, a dispersant to disperse the
pigment, and a binder to bond the pigment to the paper
when the coating i ;i dry.
The present invention f urther provides a cigarette
having a tobacco rod, and a paper wrapper dyed with a
dye comprising a Eiolvent system, cocoa powder as a
pigment, a dispersant to di~perse the pigment, and a
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binder to bond tne pigment to the wrapper paper when
the coating is dry.
~3R T r~r~ ~hsrRrPTION OF rl~i h' ~R,~r~TTNr.S
A better understanding gf the present invention will
be had upon reference to the following description in
conjunction with the ~ nying Figure which
illustrates a conventional cigarette having a paper
wrapper embodying the present invention.
DETA i r r~n Dr~srRTpTIoN OF THT~ p~R~:r~ERRr~n T~MRr,~,TMr~.NT
The present invention provides a dye coating derived
f rom natural material f or dying cigarette wrapper
paper, and more particularly such a dye having cocoa
powder as a dye pigment.
The dye of the present invention comprises a solvent
system, cocoa powder as a pigment, a dispersant to
disperse the pigment, and a binder to bond the pigment
to the paper when the coating is dry. Generally, the
ratio of r ~ ntS in the dye is from about 32 to 86
parts by weight of the solvent systom, from about 4 to
8 parts by weight of the binder, f rom about o to 3
parts by weight of the dispersant, and from about 10 to
60 parts by weight of the cocoa powder . Pref erably,
the ratio of c~ n~nts in the dye is from about 55 to
65 parts by weight o~ the solvent system, from about
4 . 5 to 6 . 5 parts by weight of the binder, f rom about
to 2 parts by weight of the dispersant, and from about
30 to 35 parts by weight of cocoa powder.
In one preferred P- :'i -L, the dye coating has a
solvent system comprising 48 weight percent alcohol and
12 weight percent isopropyl acetate, a binder
comprising 5 . 5 weight percent ethyl cellulose, a
dispersant comprising 1.5 weight percent lecithin, and
33 weight percent cocoa powder. A preferred alcohol ia
isopropyl alcohol.
In another preferred ~~~orl;r~nt~ the coating dyo has
a solvent system including a solvent comprising 48
X
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weignt percent alcohol and 12 weight percent isopropyl
acetate, a binder comprising 4.5 weight percent ethyl
cellulose and l weight perCeDt nitrocellulose, a
dispersant comprising l . 5 weight percent lecithin and
5 33 weight percent cocoa powder.
Solvents which may be used in the solvent system of
the prescnt invention include isopropyl alcohol, and
isopropyl acetate as well as, for example, ethyl
alconol, ethyl acetate, n-propyl acetate, butyl
acetates, heptane, hexane, or mixtures thereof.
Generally, the ratio of alcohol to acetate, is from
a~out 0 to 20 parts by weight alcohol to from about 80
to 100 parts by weight acetate.
Binders which may be used in the present invention
include, for example, ethyl cellulose, nitrocellulose,
sodium carboxymethyl cellulose and other cellulose
gums .
Dispersants which may be used in the present
invention include lecithin and the like.
Cocoa powder is typically used as a food and is
prepared ~y pulverizing the material L~ ;n;ng after
part of the cocoa butter is removed from chocolate
liquor .
Commercially available cocoa powders can be treated
with alkali or "Dutched" to darken its colour.
Cocoa powder not treated with alkali is referred to
as natural cocoa. Natural cocoa has a pEI of about 5 . 4
to 5 . 8, and alkali processed cocoa or "Dutched Cocoa"
nas a pEI of from about 6 to as high as 8 . 5 .
The dye - of the present invention comprises either
alkali treated cocoa powder, or natural cocoa powder as
the pigment.
The dye coating of the present invention can be made
in various ways . One pref erred method is to dissolve
the binder in the solvent system while mixing, then
adding the dispersant and pigm~nt with nigh shear
mixing to disperse the pigment in the solution.
The dye coating can be applied to the cigarette
4 20491 28
wrapper paper by various methods. The preferred method
is to use the Gravure process, which is well known in
the printing industry, because of its high speeds.
Now with ref erence to the li~igure, there is shown a
typical cigarette 10 which, includes a tobacco column 12
having a f ilter 14 coaxially located on one of its
ends. The to~acco column 12 is circumferentially
enclosed by a tobacco column wrapper paper 16, and the
filter 14 is circumferentially enclosed by tipping
paper 1~ which cicumferentially overlaps the tobac:co
column wrapper 16 at the interface of the f ilter 14 and
tobacco column 12. The wrapper paper 16 is dye coated
to a brown colour using the dye discussed above.
The f oregoing detailed description is given
primarily for clearness of understanding and no
nn~f-"5s~ry limitations are to be understood therefrom
for modifications will become obvious to one skilled in
tne art upon reading this disclosure and may be made
without departing f rom the spirit of the invention and
zo ~cope o~ the ,Ipperlded ~la~
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